/* 顶部变色修改 */
.topIndex {
    background-color: white;
}

.top .topIndex a {
    color: #254375;
}

/* 背景插入 */
.indexBack {
    width: 100%;
    height: 5757px;
    background-image: url(https://zhang0228.oss-cn-wulanchabu.aliyuncs.com/indexback.jpg);
    background-repeat: no-repeat;
    background-size: 100% 5757px;

}

/* 主体部分css样式 */
.main {
    position: relative;
    width: 3840px;
    height: 5397px;
    margin: auto;
    z-index: 0;
}

/* 主体轮番图部分制作 */
.banner {
    position: absolute;
    top: 387px;
    left: 50%;
    transform: translateX(-50%);
    width: 2400px;
    height: 1350px;
    overflow: hidden;
    background-color: chartreuse;
}
.banner img {
    width: 2400px;
    height: 1350px;
}
.imgList {
    position: absolute;
    top: 0;
    left: 0;
    width: 7200px;
    height: 1350px;
}
.imgList li img {
    float: left;
}
/* 边侧箭头 */
.bannerjian1,
.bannerjian2 {
    display: none;
    width: 184px;
    height: 328px;
    background-color: black;
    opacity: 0.1;
    text-align: left;
    line-height: 328px;
    z-index: 2;
}
.bannerjian1 {
    position: absolute;
    top: 50%;
    transform:translateY(-50%);
    border-top-right-radius: 50px;
    border-bottom-right-radius: 50px;
}
.bannerjian2 {
    position: absolute;
    top: 50%;
    right: 0;
    transform: translateY(-50%);
    text-align: right;
    border-top-left-radius: 50px;
    border-bottom-left-radius: 50px;
}
.icon-zuojiantou,
.icon-youjiantou {
    font-size: 95px;
    color: #d9d9d9;
}

/* 主体文字部分 */
.zhuxi {
    position: absolute;
    top: 1980px;
    left: 50%;
    transform: translateX(-50%);
    width: 2650px;
    text-align: center;
    color: white;
    font-size: 120px;
    font-family: 'SimSun';
}

.bookitd {
    position: absolute;
    top: 2795px;
    left: 50%;
    transform: translateX(-50%);
    width: 820px;
    height: 250px;
}

.bookitd img {
    width: 820px;
    height: 250px;
}

/* 主体部分两个小图标 */
.tubiao1 img,
.tubiao2 img {
    width: 733px;
    height: 200px;
}

.tubiao1 {
    position: absolute;
    top: 2900px;
    left: 108px;
}

.tubiao2 {
    position: absolute;
    top: 4565px;
    right: 130px;
}
/* 图书推荐模块 */
.inbook {
    position: absolute;
    bottom: 950px;
    left: 50%;
    transform: translateX(-50%);
    width: 2210px;
    height: 1260px;
    overflow: hidden;
}
.inbook img {
    width: 2210px;
    height: 1260px;
}


.inimg {
    position: absolute;
    top: 0;
    left: 0;
    width: 8840px;
    height: 1260px;
}

.inpic {
    float: left;
}

/* 边侧箭头 */
.injian1,
.injian2 {
    display: none;
    width: 184px;
    height: 328px;
    background-color: black;
    opacity: 0.1;
    text-align: left;
    line-height: 328px;
    z-index: 2;
}

.injian1 {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    border-top-right-radius: 50px;
    border-bottom-right-radius: 50px;
}

.injian2 {
    position: absolute;
    top: 50%;
    right: 0;
    transform: translateY(-50%);
    text-align: right;
    border-top-left-radius: 50px;
    border-bottom-left-radius: 50px;
}
